Extension-table.



T. F. MERRETT. EXTENSION TABLE.

APPLIoATIoN HLED Dnc. a, 1913.

1,1 16,314. Patented Nov.3,1914.

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srafrnsrarnnr ortica.

THOMAS F. MERRETT, 0F WATERFORD, NEW YORK.'

EXTENSION-TABLE.

Specification of Letters Patent.

Patented Nov. 3, 1914.

Application filed December 8, 1913. Serial No. 805,202. l

To all 'LU/0mz't may concern Be it known that l, THOMAS F. Mnimn'rr, a citizen of the United `btates, residing at lVaterfoi-d, county of Saratoga, and State of New York, have invented certain new and useful Improvements in Extension- Tables, of which the following is a specifr cation.

The invention relates to such improvements, and consists of the novel construction hereinafter described and subsequently claimed.

Reference may be had to the accompany-` ing drawings, and the reference characters marked thereon Which Yform a part of this specification. Similar characters refer to similar parts in the several figures` therein.

Figure 1` of the drawings is a central verticalsection `of an extension-tabletop einbodying my invention. Fig. 2 is a view of part of the same shown at the left end of Fig. l, the plane of the section being indicated by the broken line 2*2 in Fig. 3. Fig. 3 is a` vertical cross-section taken on the broken line 3--3 in Fig. 1. Fig. 4: is a similar cross-section taken on the broken line 4 4 in Fig. 1. Fig. 5 is a sectional view of part of the device as shown at the right-hand end of Fig. 1, the plane of the section beingindicated by the broken line 5-5 in Fig. 4l. Figs. 2 3, 4; and 5 are drawn on a larger scale thanFig. 1.

The principal `object of the invention is to facilitate the adjustment of the top sec-` tions of an extension-table and to hold the top sections in adjusted position.

Referring to the drawings wherein the invention is shown in preferred form, 1 and 2 represent the top sections of an extensiontable, which may be an ordinary dining table, said top sections having the usual depending flange or skirt, 3. Upon the top section, 1, is rotatively mounted a multiplethread screw, 4, of high pitch having an angular outer end, 5, which projects into a bushed opening, 6, formed in the flange, 3, of said top section. Upon the screw, 1, near its outer end is a circular flange, 7, formed with a peripheral groove, 8, adapted to receive a flange, 9, on the respective segmental bearing-plates, 10 and 11, both of which are attached to the inner side of the skirt-flange, 3, by means of screws, 12. The upper bearingplate, 11, is angular in crosssection and has its horizontal member attached-directly to the under side of the top section, 1, by means of screws, 13. By means of said bearing-p1ates, the screw, f1, is rotatively mounted upon the said skirt-flange, ti, of the top section, 1. A. sleeve, 14, havlng `at its inner end a nut, 15, tting the threaded portion of the screw, Ll, is in a similar manner mounted upon the skirt- Vflange, 3, of the top section, 2, by means `of segmental bearing-plates, 1G and 17, having flanges adapted to engage a peripheral groove, 18, in a circular flange, 19, on a hub, 20, which is inserted and secured within the sleeve, 111, and which hub has an angular outer end, 21, projecting into a hushed opening, 22, in the skirt-flange, 3, of said` top section, 2.

The circulating Hange, 7 ,is provided with a plurality of notches, 23, severally adapted to receive an arm, 24, projecting from a dog, 25, which dog is adapted to reciprocate vertically within a slideway formed in the skirt-flange, 3, of the top section, 1, said dog being yieldingly upheld by a leaf-spring, 26,

to cause the arm, 24, to automatically enter und engage the several notches, 23. The upper end of the dog, 25, is adapted to enter the `hushed opening, 6, and is beveled at, 27, said beveled end being adapted to be engaged by the similarly beveled end, 28, of a crank, 29, when the crank is applied to the angular end, 5, of the screw. In like manner the top section, 2, has a dog, 30, adapted to reciprocate vertically within a slideway in its skirt-flange, 3, which dog has an arm, 31, adapted to engage the several notches, 32, in the flange, 19, said dog being actuated in one direction by a coil-spring, 33, and having a beveled end, 31, adapted to be engaged by a beveled end of the crank when applied to the angular end, 21, of the hub, 20.

Vhen the parts are in normal position and the crank removed, the screw, 4, is held from rotation by means of the dog, 25, and the sleeve, 111, is held from rotation by means of the dog, 30, the beveled ends of said dogs projecting into the respective hushed-openings, 6 and 22.

To adjust the tabletop, the crank is inserted within either of the bushed openings, G or 22, into engagement with either the angular end, 5, of the screw, or the angular end, 21, of the sleeve-hub, thereby forcing outward the dog, 25 or 30, to release for rotation the screw or nut member to which the crank is applied, the other of said members being held from rotation by the other of said dogs.

By operating the crank, Q9, in the proper direction, the top sections of the table can be adjustabl'y moved toward or from each other, and after such adjustment and the removal of the crank, they may be securely heldv in adjusted position by means of the dogs, Q5 and 30.

The hub, E20, may be secured to the sleeve, lll, in any known manner, as by brazing. I have shown the inserted end of the hub polygonal in form whereby it is adapted to be secured to the sleeve, 14, by driving the end of the plug into the end of the sleeve whilethe end of the sleeve is in a heated condition, and then permitting the sleeve to shrink upon the hub. l

lVhat I claim as new and desire to secure by Letters Patent is l. In an extension-table, the combination with the separable top sections; of a screwmember rotatively mounted upon one of the top sections; a nut-member rotatively'niounted upon the other top section; separate means for holding from rotation at certain times and for releasing for rotation at certain times each of said members, said screwmember and nut-member each having means whereby it can be rotated.

2. In an extension-table, the combination with the separable top sections; of a screwmember lrotatively mounted upon one of the top sections, and having a peripheral flange formed with openings; a nut-member rotatively mounted upon the other top section and having a peripheral flange formed with openings; yielding dogs engageable with the openings in said peripheral flanges respectively, said screw-member and nut-member each having means whereby it can be rotated.

3. In an extension-table, the combination with the separable top sections; of a screwmember rotatively mounted upon one of the top sections; a nut-member rotatively mounted upon the other top section, said screw-member and nut-member each having a crank-receiving end; a yielding dog for preventing rotation of the screw-member; and a yielding` dog for preventing rotation of the nut-member, each of said dogs having a member adjacent to the neighboring crankreceiving end projecting into the path of a crank applied to said end, whereby said dog is adapted to be automatically released by the application of the crank to said crankreceiving end.

4. In an extension-table, the combination with the separable top sections, each having a skirt-flange provided with an aperture; a nut-member rotatively mounted upon one of the top sections and having an angular end 'adjacent to the aperture in the skirttlange of said top section, and adapted to be engaged by a crank inserted into said aperture; a nut-member rotatively mounted upon the other top section,'and having an angular end adjacent to the aperture in the skirtflange of said other top section and adapted to be engaged by a crank inserted into said last named aperture; and yielding dogs for preventing rotation of said'screw-member and nut-member respectively, said dogs having members projecting into said respective apertures adapted to be engaged by a crank inserted into a respective aperture to release the dog so engaged.

In testimony whereof, I have hereunto set my hand this 1st day of December, 1913.

THOMAS F. MERRET'I.

Vitnesses ROSE A. LEDUC, GERTRUDE M. Prrz.`

Copies of this patent may be obtained for ve cents each, by addressing the Commissioner of Patents,

Washington, DQ C. i 

